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Driving circuit of pixel unit and driving method thereof, and display device

a driving circuit and pixel unit technology, applied in static indicating devices, electroluminescent light sources, instruments, etc., can solve problems such as non-uniform display, and achieve the effect of uniform display effect of a display devi

Active Publication Date: 2019-04-02
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017]The present invention further provides a driving method of a driving circuit of pixel unit, the driving circuit of pixel unit being configured to drive sub-pixel units on a display panel and comprising a driving power supply signal port connected to the sub-pixel units through power supply signal lines and at least one compensation unit, the driving power supply signal port being configured to transfer a driving voltage output from a driving power supply to each of the sub-pixel units through the power supply signal lines, the driving method of the driving circuit of pixel unit comprises: performing, by the compensation unit, real-time compensation on voltage drops on the power supply signal lines for connecting the driving power supply signal port to the sub-pixel units when the sub-pixel units display different gray levels.
[0022]The present invention further provides a display device, comprising a plurality of sub-pixel units, a driving power supply, and the driving circuit of pixel unit described above. The driving power supply is electrically connected to the sub-pixel units through power supply signal lines and configured to provide a driving voltage to the sub-pixel units through the power supply signal lines. The driving circuit of pixel unit is connected to the power supply signal lines through a driving power supply signal port provided thereon, and configured to process the driving voltage output from the driving power supply, then output the processed driving voltage to the power supply signal lines through the driving power supply signal port and further transfer the processed driving voltage to each of the sub-pixel units so as to provide a driving signal to each of the sub-pixel units. The compensation unit in the driving circuit of pixel unit is configured to perform real-time compensation on voltage drops on the power supply signal lines when the sub-pixel units display different gray levels so as to provide the compensated driving voltage to each of the sub-pixel units.

Problems solved by technology

Accordingly, a dynamic interaction process is formed, and the problem of non-uniform display is caused.

Method used

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  • Driving circuit of pixel unit and driving method thereof, and display device
  • Driving circuit of pixel unit and driving method thereof, and display device
  • Driving circuit of pixel unit and driving method thereof, and display device

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first embodiment

[0034]Referring to FIGS. 2 through 4, this embodiment provides a driving circuit of pixel unit configured to drive sub-pixel units A on a display panel. The driving circuit of pixel unit comprises a driving power supply signal port connected to the pixel units via power supply signal lines L, and at least one compensation unit 100. The driving power supply signal port is configured to transfer a driving voltage VDD output from a driving power supply to each of the sub-pixel units A via the power supply signal lines L. The compensation unit 100 is configured to perform real-time compensation on voltage drops on the power supply signal lines when the sub-pixel units A perform display.

[0035]As the power supply signal lines L for connecting the pixel units to the driving power supply signal port have certain resistances (shown by a dashed frame in FIG. 2), certain voltage drops will be inevitably generated on the power supply signal lines L when the sub-pixel units A perform display. Fo...

second embodiment

[0049]This embodiment provides a driving method of a driving circuit of pixel unit. The driving circuit of pixel unit is configured to drive sub-pixel units A on a display panel, and comprises a driving power supply signal port connected to the sub-pixel units A through power supply signal lines L and at least one compensation unit 100. The driving power supply signal port is configured to transfer a driving voltage output from a driving power supply to each of the sub-pixel units A through the power supply signal lines L. The driving circuit of pixel unit may also be the driving circuit of pixel unit provided by the first embodiment. The driving method provided by this embodiment comprises: performing, by the compensation unit 100, real-time compensation on voltage drops on the power supply signal lines L for connecting the driving power supply signal port to the sub-pixel units A when the sub-pixel units A display different gray levels.

[0050]As the voltage drops on the power suppl...

third embodiment

[0058]This embodiment provides a display device comprising a plurality of sub-pixel units, a driving power supply and the driving circuit of pixel unit provided by the first embodiment. The driving power supply is electrically connected to the sub-pixel units A through power supply signal lines L and configured to provide a driving voltage VDD to the sub-pixel units A through the power supply signal lines L. The driving circuit of pixel unit is connected to the power supply signal lines L through a driving power supply signal port provided thereon, and configured to process the driving voltage VDD output from the driving power supply, then output the processed driving voltage to the power supply signal lines L through the driving power supply signal port and further transfer the processed driving voltage to each of the sub-pixel units A so as to provide a driving signal to each of the sub-pixel units A. The compensation unit 100 in the driving circuit of pixel unit is configured to ...

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PUM

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Abstract

The present invention provides a driving circuit of pixel unit and a driving method thereof, and a display device. The driving circuit of pixel unit is configured to drive sub-pixel units on a display panel, and comprises a driving power supply signal port connected to the sub-pixel units through power supply signal lines and at least one compensation unit. The driving power supply signal port is configured to transfer a driving voltage output from the driving power supply to each of the sub-pixel units through the power supply signal lines. The compensation unit is configured to perform real-time compensation on voltage drops on the power supply signal lines when the sub-pixel units display different gray levels.

Description

[0001]This is a National Phase Application filed under 35 U.S.C. 371 as a national stage of PCT / CN2014 / 086730, filed Sep. 17, 2014, an application claiming the benefit of Chinese Application No. 201410208648.8, filed May 16, 2014, the content of each of which is hereby incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention belongs to the technical field of organic electroluminescent display, and particularly relates to a driving circuit of pixel unit and a driving method thereof, and a display device.BACKGROUND OF THE INVENTION[0003]In comparison to a thin film transistor liquid crystal display (TFT-LCD) serving as a mainstream display technology at present, an organic light emitting diode (OLED) display has advantages of wide angle of view, high brightness, high contrast ratio, low energy consumption, lightness, thinness and the like, and thus becomes a focus of the present flat panel display technology.[0004]The driving methods for organic ligh...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G09G3/00G09G3/3258H05B33/08G06F3/038G09G3/32G09G3/3275H05B44/00
CPCG09G3/3258G09G3/3275G09G2320/0285G09G2320/0223G09G2320/029
Inventor WANG, YING
Owner BOE TECH GRP CO LTD